You need to retune all your needle settings and change your glow plugs. Turn your HSN clockwise until it stops, then turn it counter clockwise 4 times, restart your engine, run the buggy. If you feel it is too lean, turn the HSN counter clockwise again, otherwise, turn the HSN clockwise to richen the settings. Once you notice the engine responds to your inputs as expected, retune your LSN until you get it right.

I used different fuels of different brands, nitro and oil content, including helicopter and airplane fuels. Everything works well, it is only a matter of retuning the carb settings.